To identify the institution that announces the 'Class of Young Global Leaders':
1. The World Economic Forum (WEF) announces the 'Class of Young Global Leaders' (YGLs).
2. This initiative recognizes young leaders from around the world who are committed to shaping the global future.
3. The other institutions listed are involved in various global activities but are not associated with this specific recognition.
Therefore, the correct answer is (2) World Economic Forum.